Display Filter Reference: Link Access Procedure, Channel D (LAPD)

Protocol field name: lapd

Versions: 1.0.0 to 3.6.8

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Field name Description Type Versions
lapd.abort Abort Boolean 1.10.0 to 1.10.14
lapd.abort.expert Formatted message Label 1.12.0 to 3.6.8
lapd.address Address Field Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.checksum Checksum Unsigned integer (2 bytes) 1.2.0 to 3.6.8
lapd.checksum.status Checksum Status Unsigned integer (1 byte) 2.2.0 to 3.6.8
lapd.checksum_bad Bad Checksum Boolean 1.2.0 to 2.0.16
lapd.checksum_bad.expert Bad FCS Label 1.12.0 to 3.6.8
lapd.checksum_good Good Checksum Boolean 1.2.0 to 2.0.16
lapd.control Control Field Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.control.f Final Boolean 1.0.0 to 3.6.8
lapd.control.ftype Frame type Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.control.n_r N(R) Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.control.n_s N(S) Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.control.p Poll Boolean 1.0.0 to 3.6.8
lapd.control.s_ftype Supervisory frame type Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.control.u_modifier_cmd Command Unsigned integer (1 byte) 1.0.0 to 3.6.8
lapd.control.u_modifier_resp Response Unsigned integer (1 byte) 1.0.0 to 3.6.8
lapd.cr C/R Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.direction Direction Unsigned integer (4 bytes) 1.0.0 to 3.6.8
lapd.ea1 EA1 Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.ea2 EA2 Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.sapi SAPI Unsigned integer (2 bytes) 1.0.0 to 3.6.8
lapd.tei TEI Unsigned integer (2 bytes) 1.0.0 to 3.6.8